Q23 of 157 Page 760

If P(-1, 1) is the midpoint of the line segment joining A(-3, b) and B(1, b + 4) then b = ?

∴ by Midpoint Formula we have,


⇒ and y


Finding value of b:


⇒


⇒ 2 = 2b + 4


⇒ 2 – 4 = 2b


⇒ b = -2/2


⇒ b = -1


Therefore the value of b is -1.

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